Convex brush



FIG. 1 is a perspective view;

FIG. 2 is an end view;

FIG. 3 is a top plan view;

FIG. 4 is a side elevational view;

The undisclosed end and side are the same in appearance as the respective end and side shown in FIGS. 2 and 4 and the undisclosed bottom is flat and unornamented. 

The ornamental design for a convex brush, as shown and described. 